1988 Trans-Am TPI 305 - L31
1988 Trans-Am TPI 305 - L31
Hi guys, I looked around for an L98 recently to replace the 140,000 mile, water using 305 with no luck. Now I see a lot of guys are going with the L31. It seems reasonable at around 2 grand shipped, but I would appreciate some opinions on it. Plan would be to keep the TPI for it. I know I would have to get an intake to mate the TPI to the Vortec heads and also change the injectors and a few other parts. I'm not looking for a 12 second car, just something that will get out of it's own way. Thanks for any opinions, Ron.
Joined: Mar 2014
Posts: 4,553
Likes: 806
From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: 1988 Trans-Am TPI 305 - L31
It will definitely get out of its own way with the L31 plugged in especially if you put a lil more cam in it.
Joined: Mar 2014
Posts: 4,553
Likes: 806
From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: 1988 Trans-Am TPI 305 - L31
Look at a Herberts Cams CCH216. 215int 220exh 465Lift 114 Lobe center or the CCH225 which is 210int 215 exh 450 int 465 exh on a 110 Lobe center. Either cam should work fine with stock lift limitations of a Vortec head and would be perfect for a TPI that isn't going to rev much over 5500 RPMS anyhow.
Last edited by dmccain; Jul 15, 2016 at 01:00 PM.
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